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(No Model.) 2 sheets-sheet I.l

I". W. sIvIITII, J1. an s. s. WILLIAMSON.

SASH BALANCE.

No. 301,289. Patented July I, 18.84.

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(No Model.) 2 Sheets-Sheet 2.

I?. W. SMITH, Jr. 8: S. S. WILLIAMSON. 'sAsH BALANCE.

110,801,289. Patented July 1,1884.

\%L Weiar 6MM Warren 4Straitne Yl?Arien'r 'raient FRIEND W'. SMITI-I, JE., AND S. STUART WILLIAMSON, OF BRIDGEPORT, CONNECTICUT, ASSIGNORS TO THE SMITH & EGGEMANUFACTURING COMPANY, OF SAME PLACE.

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SPECIFICATION forming part of Letters Patent No. 301,289, dated J'uly ll 1884.

Application filed October 15, 1883. (No model.)

To @,ZZ whom t may concern.'

Be it known that we,FnInND W. SMITH, Jr., and S. STUART WILLIAMSON, citizens of the United States, residing at Bridgeport, in the 5 county of Fairfield and State of Connecticut,

have invented certain new and useful Improvements in Sash-Balances, and we do hereby declare thefollowing to be a full, clear, and exact description ofthe invention, such as will enable othersxskilled in the art to which it appertains to make and use the same.

i Our invention relates to certain novel and useful improvements in devices for suspending window-sashes and the like by. double chains, and has for its object to equalize the strain on the chains; and with these ends in view our invention consists in the details of construction and combination of elements hereinafter fully and in detail explained, and then 2O specically designated by the claims.

In order that those skilled in the art to which our invention appertains may more fully understand its construction and operation, we will proceed to describe the same in detai1,re

ferring by letter `to the accompanying draw` ings, forming a part of this specification, in which-f L Figure l is a front elevation showing a bar with the chains pivoted at the extremities thereof and the weight suspended therefrom;

Fig. 2, a similar view illustrating the arrangement of the bars when four` chains are used. Fig. 3 shows a triangnlarshaped plate with the chains pivoted at the upper extremities 3 5 thereof, andthe weight hung in such a manner that any eccentric position ofthe latter with respect to the chains is prevented. Fig. L illustrates the weight attached to the housing of a pulley and the chains secured to an independent band or cable passed around said pulley, and Fig. 5 a similar view showing an auxiliary set of pulleys for keeping the chains close together.

Similar letters denote like parts in the several iigurcs of the drawings.

A is a bar, and B the chains connected at the extremities thereof. C is a link or hook pivoted to the bar, and D the weight hanging from and swinging freely on said link. When it is desired to use four chains,this may readily 5o be accomplished by two bars of different vlengths, pivoted at a common center, as seen at Fig. 2, the object of this of course being to space oi'l' the chains from each other, so that they can run over the pulley in. their independent grooves. An ordinary plate, E, of triangular shapewsuch as is shown at Fig. 3- niay be used with equal facility by providing a slot, F, 'at the bottom ofthe plate for the accommodation of the hook or linl; by which the 6o weight is suspended. In this instancethe slot should be curved to correspond with the arc which would be described by the plate at that point whenever either upper extremity is lifted or lowered by the `action of the chains, in order that the said hook orlink and the weight may assume by gravity a position in a vertical line centrally between the two chains. Ve are enabled to equalize the strain on the chains and at the same time keep them at an 7o equal distance apart by using a pulley, G, pivoted within a housing or block, I-I, the latter terminating at its lower extremity in a hook or eye, I, for the accommodation ofthe weight, as clearly shown at Fig. Ll. The chains are connected with a wire cable or metallic band, J', or other similar device passing around said pulley or, if desired, the chain itself may run around the pulley, although we prefer to use an independent wire or band, as shown. In 8o order that a larger and stronger pulley may be used, we extend the bloclr II upward, as seen at Fig. 5, so as to form ears K, and between these ears pivot small guide-pulleys L in such manner that the distance between the lat- 8 5 ter is equal to the required space between the chains. Of course it will be readily understood that rope, wire, or any other suitable material may be usedinstead of chain, our invention not necessarily being confined in its application to any material, but being equally adapted in its utility to chain, rope, wire, or any material that can be run over a pulley.

Our invention as illustrated at Figs. 4 and 5 is not essentially different from the bar-and-` 95 plate construction shown in Figs. 1, 2, and 3, since the pulley corresponds precisely with the plate or bar, while the block or housing is nothingl more than the pvoted hook to which the weight is attached.

We do not wish to be understood as claiming, broadly, a device for equalizing the strain on the chains, 8m., in a sash-hanging device, as we are aware that this is not new; but

'What we do clainuas new, and desire to secure by Letters Patent, is

l. In a device for hanging sashes, the coinbination,with the chains or other material, of a single rocking bar or plate, a weight, and means for suspending said weight loosely in a vertical plane below the center of said bar or plate and central of the chains, substantially as described.

2. In a device for hanging sashes with double chains, a bar or plate having pivoted thereto at its central portion means for counterbalancing the weight of the sash,in combination with the chains attached to said. bar or plate without said pivotal point, whereby the strain on the chains is equalize-d, substantially as and for" the purposes set forth.

In testimony whereof we afX our signatures in presence of two witnesses.

FRIEND YV. SMITH, JR. S. STUART WILLIAMSON.

XVitnesses: i

Guo. W. KEELEY, SAM. B. SUMNER. 

